/**
 * Copyright 2011 Adrian Stabiszewski, as@nfctools.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.nfctools.ndef.wkt.handover.encoder;

import org.nfctools.ndef.NdefMessageEncoder;
import org.nfctools.ndef.wkt.WellKnownRecordPayloadEncoder;
import org.nfctools.ndef.wkt.handover.records.CollisionResolutionRecord;
import org.nfctools.ndef.wkt.records.WellKnownRecord;

/**
 * 
 * @author Thomas Rorvik Skjolberg (skjolber@gmail.com)
 * 
 */

public class CollisionResolutionRecordEncoder implements WellKnownRecordPayloadEncoder {

	@Override
	public byte[] encodePayload(WellKnownRecord wellKnownRecord, NdefMessageEncoder messageEncoder) {

		CollisionResolutionRecord collisionResolutionRecord = (CollisionResolutionRecord)wellKnownRecord;

		int randomNumber = collisionResolutionRecord.getRandomNumber();

		byte[] payload = new byte[] { (byte)((randomNumber >> 8) & 0xFF), (byte)(randomNumber & 0xFF) }; // msb, lsb

		return payload;
	}

}
